Genre: Mystery, supernatural, romance

Dusk Maiden of Amnesia (黄昏乙女×アムネジア, Tasogare Otome × Amunejia) is a Japanese manga series, written and illustrated by the duo Maybe. It was published by Square Enix and serialized in the Monthly Gangan Joker magazine. An anime adaptation by Silver Link aired between April and June 2012. It has been licensed by Sentai Filmworks in North America.

Setting:
The story takes place at Seikyou Private Academy: an extremely old school with several buildings, each built at different points in history without care for the existing architecture. Many of them overlap and mix with each other, resulting in an unintentional maze-like structure, within which the untrained can easily lose their way. The School was built over an old shrine, which is where Yuuko died. Since her body and regrets are tied to the school, she is unable to leave the school grounds even if she wanted to. In the series, a 'Ghost' is formed from the person's regrets while they were alive. One can see them only if believing in the ghost's existence - but depending on one's expectations and knowledge, what they see will vary greatly: from Yuuko's true form (as she sees herself and was before she died) to a demonic entity.

Manga:
The story revolves around a first-year middle school student, Teiichi Niiya who had just enrolled at Seikyou Private Academy. When he gets lost in one of the school's old buildings, he meets a girl named Yuuko Kanoe who reveals herself as a ghost with no memories. Teiichi then decides to investigate her death by looking through the school's seven mysteries revolving around her. Throughout the story, Teiichi and Yuuko discover the truth about these ghost stories while helping those who are troubled. It is discovered that Yuuko has no memories as she forced her entire reason for existing into another dark form referred to as "Shadow Yuuko". If she can accept this part of her, she can remember why she still is trapped as a ghost, i.e. her final wish.

Anime:
  The anime follows a slightly different story: Teiichi initially begins to help Yuuko, as he does in the manga. There is only little talk of the Seven Mysteries and never in a central light. However, as Kirie and Okonogi get closer to him, Yuuko begins to develop jealousy. Unbeknownst to anyone at the time, she cannot harbour negative feelings and as a result, she shifts them and the memories associated with them to "Shadow-Yuuko", who like in the manga, was already holding Yuuko's grudge against her sister.

Review:
  I watched this anime a long time ago, it was pretty good, funny even, I might rewatch the anime again and read the manga since the anime ended with a cliffhanger. I'm curious about their story and how it ends.

I say check this out when you can.